地下工程分期建设防水预留后接技术(四)——内撑支护预留拼接构造设计与施工

Subsequent Waterproofing Connection Technology(Part 4)for Reserved Joints of Staged Underground Construction——Design and Construction of Reserved Connection Structure of Internal Support

对分期建设内撑支护的地下工程,在系统整合优化的基础上,讨论了预留拼接的具体构造,包括设计与施工。其中防水的基本做法是:铺设双层叠置的预铺防水卷材,使一期混凝土与外置的预铺防水卷材反粘,二期与内置的预铺防水卷材反粘,实现两期混凝土主体外防水连续密封。

On the basis of system integration and optimization,this paper discusses the specific connecting structure for the reserved parts of underground works with internal support constructed by stages,including design and construction.The basic method of waterproofing is to lay double-layer laminated pre-laid waterproofing membrane,so that the first phase concrete can be bonded reversely with the external pre-laid waterproofing membrane,and the second phase concrete can be bonded to the internal pre-laid waterproofing membrane.In this way,continuous external waterproofing for the concrete of the two phases is realized.